Hey i just installed my head unit and went to turn my car on and its making a breathing sound near my feet.
Why do you think this is happening?
when you put everything back together you have left something out, i had the same problem in my car, from memory it is something to do with the hot and cold lever, check that you havent left a screw out or something, hope this helps
Theres a ghost under your carpet. Just go over everything make sure its all plugged in and hook up correctly
sounds like when you put the dash back together,you didnt plug the lines for the air con/heater back on. its a weird looking thing with about 6 rubber hoses coming off it.
as above have a look at the small rubber lines, you have left/knocked one off and it needs plugging back on.
yep sounds like a vacuum hose near the headunit
mine sometimes makes a a sound when i boot it from around the headunit
but i really cant be bothered taking it all apart to fix it lol